Concrete-mixer.



No. 819,299. Y PATENTED MAY 1, 1906.

J. MILLER;

CONCRETE MIXEE.

APPLICATION FILED MAY18, 1905.

4 2 SHEETS-SHEET l.,

No. 819,299. PATENTED MAY 1, 1906.

J.MILLER.l CONCRETE MIXER.

'APPLIGA-TION FILED MAY 18. 1905.

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JOHN MILLEILOF MINNEAPOLIS, MINNESOTA, ASSIGNOR TO WINNER BLOCK MACHINE COMPANY, V.A CORPORATION vOF MINNESOTA: l

CONCRETE-Mixen.

Specification of Letters Patent.

Patented May 1, 1906.

@maar ned May is, 1905. serai No. 260,946.,

nes'ota, have invented certain new and useful Improvements in Concrete-Mixers; and I dohereby declare the followingto be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and usethe saine.

My invention has for itsv object to provide an improved device for mixing concrete?Y that is, for mixing together the sand, the

gravel, the cement, and the Water which are to form the concrete.

To the above l,ends-the invention consists of the novel device and combinations of devices hereinafter described, and defined in the claims. Y

In the accompanying drawings, which illustrate my invention, like characters indicate like parts throughout the several views.

Figure 1 is a plan View showing the complete machine, some parts beingbroken away. ig. 2 is an end elevation of the machine, and Fig. 3 is a transverse vertical section taken on the line x3 ac3 of Fig. 1.

The numeral 1 indicates'l a miximg-trough constructed of metal and open at its top. This mixing-trough, as shown,` is U-shaped in cross-section and at its ends is provided with heads 2, having outwardly-projecting trunnions 3, that are journaled in pedestal-brackets 4. One of the heads 2 is provided with an internal annular gear 5, that meshes with a pinion 6, carried by ashort shaft 7, journaled 1n an extension 41 of one of the pedestals 4. At

its outer end the shaft 7 carries a Worm-gear 8, that meshes with a Worm 9 of a 'shaft '10, which shaft is journaled in. suitable .bearings inthe pedestal extension 4a and is provided at one end with a miter-gear 11. The mitergear 11 meshes with another miter-gear 12, that is carried by a short counter-shaft 13, journaled in the pedestal extension 4a. At its outer end the shaft 13 is provided with a' iixed pulley 14 and a loose pulley 15. V

The trunnions 3 of the heads 2 form bearings for a long shaft 16, which at its interme- `the square interportion of the shaft 16 is a plurality of rotary-disposed arms 18, which arms are arranged in diametrically-extended pairsand are provided with overlapping hub portionsthat are adapted to be clamped onto the said shaft by nutted bolts 19 passed therethrough. Rigidly but adjustably secured to the outer ends of the arms 18 are mixingblades or Vagitatin,g -plates 20, that stand at an angle to the plane' of rotation of said arms. As shown, said blades 20 are secured to expanded end portions of said arms by slot-andbolt Connections 2 1, that permit radial adjustments of said blades.

It is important to note that those blades or plates 20 that stand in longitudinal line with each other are all inclined in the same direction' and that the blades of circumferentially-adjacent rows are inclined to turn in opposite direction. This arrangement is irnportant because of the rotarymovement of the shaft 16 and arms and blades carried thereby. The reversely-bcveled blades or plates will come into action on the concrete ingredients alternately and in passing thereithrough will plow or turn the same, iirst in one direction and then in the other, thereby thoroughly mixing the same. The radial adjustment of the blades 20 permits the same to be set for close engagement with the cylindrical bottoni of the trough or hopper 1. It will also be noted that the extreme members of the blades 20 are set at a backward inclination with 'respect to their direction of travel and have their outer edges extended radially and working close to the respective adj acentheads of the mixing-trough to thro'. the concrete ingredients out and away from said heads.

Under the mixing action the trough 1 is of course held stationary with its open end turned upward. The shaft 16 will then receive its rotary movement from a sprocketchain, (not shown,) but which will run over the sprocket 17. After the concrete ingredients have been thoroughly mixed they may be dumped from the trough 1 by tilting the said trough or turning the same upside down, and this may be done by ruiming the belt (not shown) from the loose pulley 15 onto the Iixed pulley 14, and thereby givingthe said trough thc con'iplete rotation. This dump.- ing may be accomplished either while the shaft 16 is stopped or while itis being rotated.

The device described, while extrenwljv si.

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ple, is eiicient for the purposes had in view l and is capable of performing in a' most satlsfactory manner a large amount of Work in a very-short time. y

The Worm and worm-gear in theitroughrotating drive, serve normally, to lock the sald trough in an operative position and against rotation.

From What has been said it will be under- 4stood that the machine described is capable of modification Within the scope of my invention as herein set forth and claimed.

What claim, and desire to secure by Letters Patent of the United States, vis as follows: 1. The combination with a mixing-trough, of a shaft extending longitudinally through I 'the same, said. shaft having radial blades located in lon tudinal rows and provided at their free en s with obliquely-set blades, the

blades of the one row being given an inclination in opposite direction from that of the adjacent roW and the extreme end members of ally and wor said blades being set at a backward inclination With respect to their direction of travel a'vvorm and Worm-gear for normally locking osition, and arotary shaft the same in a set extended longitu 'nallythrough thejournals of said trough, and provided with radial arms' having at their ends, obliquelyet agitatingblades, substantially as. described.

In testimony whereof I aiix my signature in presenceo'f tWo'Witnesses.

W itnesses:Y H. D. KILGORE,

F.D.`MERQHANT.

f JOHN MILLER. 

